Improvement in indexes



J. R. MGKNIGHT.. Index.-

No, 201,693. Patented'Mach 26,1878.

'NITED YSTATES PATENT OFFICEV JOHN R. MCKNIGHT, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN INDEXES.

Specification forming part of Letters Patent No. 201,693, dated March 26, 1878 application led March 26, 1877.

To all whom it may concern:

Be it known that I, JOHN R. MCKNIGHT, of Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Indexes, which is fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure l represents the edge of an index leaf with the tab applied, illustrating the manner of constructing and attaching the tab; and Fig. 2, a similar` View of the same reversed, showing the arrangement of index-letters on the opposite side of the tab.

My invention relates to the peculiar construction of the index-tab and the manner of attaching it to the leaves.

It consists in a tab of two thicknesses doubled on a line running across the tab at an inclination, and arranged to claspA the edge of the leaf, so as to be fastened on both sides thereof. p

In the drawings, A represents the leaf of an index, which is provided with a tab, B, at-

` tached thereto in such a way as to project beyond its outer edge.

The tabs are made from narrow strips of paper, parchment, leather, or any other suitable material. The strips are folded once upon each other, as shown in the drawings; but the fold is made on an inclined line across the strip, instead of straight across, so that the ends lap by each other at the edges. The tabs thus folded are arranged upon the leaf, so as to clasp the edge below its free ends, in

which position it is fastened to the leaf on both sides thereof. This construction and arrange ment of the tab provides a large surface for gumming, so that the tab is fastened to the leaf much more securely than, and without so much danger of tearing the leaf as, when the strip is folded on a straight line, so as to bring the ends directly opposite each other.

The strips should be folded so as to leave the smooth side out, unless both are the same,

thus providing a smooth surface on both sides depending on which side of the index is to be v considered its front, as the iirst page on that side must bear the first letter of the index. The index is therefore adapted for use either in front or at the back of the book to which it is applied.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

Theindexleaves A, in combination with letter-tabs B, folded on an inclined line, whereby the ends of the tabs, when applied to the leaves, are caused to lap by each other, substantially as shown in the drawings, and for the purposemset forth.

' JOHN R. MCKNIGHT. Witnesses:

L. A. BUNTING, W. C. OoRLIEs. 

